Stop watch



FIG. 1 is a front elevational view of a stop watch showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front and bottom perspective view thereof. 

The ornamental design for a stop watch, as shown and described. 